Datasheet > DS1822

DS1822

更新时间： 2024-01-12 16:53:42

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
20页	269K
描述
Econo 1-Wire Digital Thermometer

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中文翻译

获取价格

技术参数
数据手册

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DS1822 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP8,.25
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	Factory Lead Time：	6 weeks
风险等级：	1.59	Samacsys Description：	Board Mount Temperature Sensors Econo 1-Wire Digital Thermometer
最大精度（摄氏度）：	2 Cel	其他特性：	COMPLIANCE TO MIL-150
主体宽度：	3.91 mm	主体高度：	1.55 mm
主体长度或直径：	4.88 mm	外壳：	PLASTIC
JESD-609代码：	e3	安装特点：	SURFACE MOUNT
位数：	12	端子数量：	8
最大工作电流：	1.5 mA	最高工作温度：	125 °C
最低工作温度：	-55 °C	输出接口类型：	1-WIRE INTERFACE
封装主体材料：	PLASTIC/EPOXY	封装等效代码：	SOP8,.25
封装形状/形式：	RECTANGULAR	电源：	3.3/5 V
传感器/换能器类型：	TEMPERATURE SENSOR,SWITCH/DIGITAL OUTPUT,SERIAL	子类别：	Other Sensors/Transducers
最大供电电压：	5.5 V	最小供电电压：	3 V
表面贴装：	YES	端子面层：	Matte Tin (Sn)
端接类型：	SOLDER

DS1822 数据手册

DS1822

data from the DS1822 is valid for 15ꢀs after the falling edge that initiated the read time slot. Therefore,

the master must release the bus and then sample the bus state within 15ꢀs from the start of the slot.

Figure 15 illustrates that the sum of T_INIT, T_RC, and T_SAMPLEmust be less than 15ꢀs for a read time slot.

Figure 16 shows that system timing margin is maximized by keeping T_INITand T_RCas short as possible

and by locating the master sample time during read time slots towards the end of the 15ꢀs period.

DETAILED MASTER READ 1 TIMING Figure 15

V_PU

VIH of Master

1-WIRE BUS

GND

T_INT> 1ꢀs

T_RC

Master samples

15ꢀs

RECOMMENDED MASTER READ 1 TIMING Figure 16

V_PU

VIH of Master

1-WIRE BUS

GND

Master samples

T_INT

= T_RC=

small small

15 ꢀs

LINE TYPE LEGEND

Bus master pulling low

Resistor pullup

RELATED APPLICATION NOTES

The following Application Notes can be applied to the DS1822. These notes can be obtained from the

Dallas Semiconductor “Application Note Book,” via the Dallas website at http://www.dalsemi.com/, or

through our faxback service at (214) 450–0441.

Application Note 27: Understanding and Using Cyclic Redundancy Checks with Dallas Semiconductor

Touch Memory Product

Application Note 55: Extending the Contact Range of Touch Memories

Application Note 74: Reading and Writing Touch Memories via Serial Interfaces

Application Note 104: Minimalist Temperature Control Demo

Application Note 106: Complex MicroLANs

Application Note 108: MicroLAN—In the Long Run

Application Note 162: Interfacing the DS18X20/DS1822 1-Wire Temperature Sensor in a

Microcontroller Environment

Sample 1-Wire subroutines that can be used in conjunction with AN74 can be downloaded from the

Dallas website or anonymous FTP Site.

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